getpt (3)

Contents

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
VERSIONS
CONFORMING TO
SEE ALSO
COLOPHON

NAME

getpt - open the pseudoterminal master (PTM)

SYNOPSIS

#define _GNU_SOURCE             /* See feature_test_macros(7) */
#include <stdlib.h>

int getpt(void);

DESCRIPTION

getpt() opens a pseudoterminal master and returns its file descriptor. It is equivalent to 

    open(/dev/ptmx, O_RDWR | O_NOCTTY);
on Linux systems, though the pseudoterminal master is located elsewhere on some systems that use GNU Libc.

RETURN VALUE

getpt() returns an open file descriptor upon successful completion. Otherwise, it returns -1 and sets errno to indicate the error.

ERRORS

getpt() can fail with various errors described in open(2).

VERSIONS

getpt() is provided in glibc since version 2.1.

CONFORMING TO

getpt() is glibc-specific; use posix_openpt(3) instead.

SEE ALSO

grantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4), pty(7)

COLOPHON

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